Maghine for shaving and slotting screws



March 14, 1933.

F. E. NEWTON MACHINE FOR SHAVING AND SLOTTING SCREWS March 14, 1933. E NEWTON 1,901,405

MACHINE FOR SHAVING AND SLTTING SCREWS Filed DeC. 18 1.951 4 Sheets-Sheet 2 /NVE/vraf? ma M March 14, 1933.

F. E. NEWTON 1,901,405

MACHINE FOR SHAVING AND SLOTTING SGREWS Filed Dec. 18 1931 4 Sheets-Sheet 5 March 14, F. E NEWTON MACHINE FOR SHAVING AND SLOTTING SCREWS Filed Dec. 18, 1931 4'SheetS-Sheet 4 Patented Mar. 144,` 1933 arman rawmxinmmmzonm:commczbmnmry n Y mmsvmavie ISSLfSerivl. No. 581,827;

igis an' elevation offtliemechanismjfor lmpartihgthree intermittentrotatoi'yVY move- A:Bis a horizontal sectionon approzi'matelly"."1v

engagementfwiththe slottingf saw; L Y 12 Withdi'a'wing elements'upo'n'the blanks) f is fstened' tOtheCamShablT the lever and intermeshing gear and segments, causes the pawl 8 to turn the shaft which carries the spindle head, 120, Figs. 1 3.

7Adapted to engage notches 21, which are 120o apart in the periphery of the index disk 6, is a tooth 22 onthe end h of a lever 23 which is pivote'don a vstud 24. :A spring-251- connected to the outer end of'thislei-ierAte'r-ids to hold the tooth in engagement with the periphery of the index disk. l-Theinner end..-

of the lever 23 has a shoe 26 that vis adapted to be engaged by a cam block'f27 'which is adjustably fastened to the disk 1G, F ig. 3.

This cam block at the proper intervals engages `the .lever 23 andwithdraws thetooth from a` notch in the periphery ofthe indexf disk so that the, pawlmay rotate the drive disk and shaft.. At the-end of the push'cf the pawl the spring draws the lever so4 that the tooth will 'drop into a notch and stop the rotation of the shaft withthe spindles in exact positionwith relation tothe tools,

This mechanism producesa very. rapid rotation ofthe shaft and. consequently gives" the spindlesa quick revolving movement, and previously' it frequently ,happened that,

e owing to thespeed and momentum of the parts, .the index tooth wouldnotcnter the notch of vthe index disk and the shaft would turn too far, and thus derange the timing relations of the mechanisms.

To obviate this and ensure the. entryfof the Vtooth into an Vindex notch ofthe disk, without applying excessive resistanceto con-` trol th'ese movements, the yfemale member 28 of a splitring clutch is mounted `so as to rotate with the shaft 3, while the male memberv 29'of theclutch is heldtfromrotationl by an arm 30 which is Vfastened to the vshaft 13, `Fig. 3.. As the segment nearsthe end of its upward movement this-clutch is set by a stem 31 that is attached tothe female member and is engagedA and lifted by an arm 32 adjustably fastened to the segment lever 12. Aspring 33 pulls the Vstein down. This causes the clutch, to lretardthe-rotation vofl the sha-ftas it approachesthe completion of its rotary movements, Fig.` 3.

. .There is ra spindle 34 Vrotatably mounted in each of the threev arms ofthe spindlehead.v 4.Each spindle hasajhollow head 3 57 on which a pulley 3 6 is fastened.l In;V each spindle head are chuck jaws :371; carried by leversy 38 that are engagedfzby lever-S39.

The leversf39 have inclined tails 4 0 which. when engaged by the; collar 41 slidable lon the head, cause the levers togclosethe chuck, Ajaws on a blank. Whenthecollarfis slid forward'andthe jaws allowedfto open, a spring pressedpin 42ejectsthe blank from the chuck jaws, Fig. 5 Tlie eollar 41 'isl slidback and forth on the spindle by the.`

arm 43 thatris moved'-alongthe bar 44 the @tra 45 on thecaiajstaftiv. rig.' 4,'

'finally back to 'reisliaving'positiom the jaws vare opened after the re-shavin' has been kaccomplished 'so that: the'; .blanl s may be ejeted- The fblanks arefbr'ought' down into the y chuck jaws by anycommon feed mechanism,

for exam'ple,by"theriingers 46 mounted on the end of an oscillatory arm 47,y Fig. 2. A belt 48 running aroundfpulleysli) and 50'is vguided so as to Aengage',the pulleys 36 on' the spindlesfwhich are in s havingand re-shav- ,ing positions, but be outofengagenent with f,

thepulley onfthe spindle that is inslotting position, Figz. The pulley 50 is .fastened a spindle moves into slottng position its jpulley j3 6 isA engagedbyafrictionbrake ,54

to the shaftlthathas apinion52 engaged `i by a gear 53 on the shaft 20,`Fig`s. 3, 4. As

which ensure's'the stopping'of itsfrotation while theblankisv `being slotted, 4.-.

After a yblank` hasl been passed', intofand is clamped by the chuck jaws the spindle head is fotateajiao and; Stopped whiiethe'j blank' is g s haveaby the fooi 55; 'when the shavingL is completed the head is rotated another 1209 andidwells while, a slot is being,

',cut by the ysaw 56. Uponv the completion of the slotting, the Vhead isrotatedl back to iirstjposition 'wherefit' dwellsfwhile' :the blank is re'fshavedfby thetool 57. After rei V shaving l the chuck jaws` are opened Vand the blankejected and another blank entered.

As previously vmentioned,` shaving requires Vmore', Ytimethan is required for theslotting,` A or for reshavingandloading andejecting. .Therefore the] dwellsl in tlierotary 'movementsfofgthe spindle head are controlled'by thel timeit takes'for shaving.y

i fruegreishavng i001 57 ijsplampea' to a f l slide. 58 Vwhich is movable.ifn 'and out ona way59, being drawn `outward by a spring 60, Figsd, 2 Thisslide is moved in war at the proper time by a cam 61 on the'cam s haft'lzfacting onfthe lower end of the lever, 62 thatjisvfulcrumed onthe shaft 63. 'Tbsf leverat itsupper end-has anadjusting screw 64 which engages a lug, 65 ,projecting fromV The Staviag Tai-0 1 5 5`f`ig clamped m a 'Slide 66 thatfis movedin and vout on the way 67.

acting on'the leverffO'thatis fulcrumedo'nv "the shaft'63. l This vlever lias'a downwardlyz extending. arm 7l that isconnected with theV said stops of the head carrying the spindles.v

ing the spindles at each of thevstations is short. Owing to these conditions a large output of accurately finished articlesfisvpro# duced in a' much shortertime than was pos@` this type.

sible with the prior machines of The invent-ion claimed is n 1. A shaving and .slotting machinecomparting three intermittent. rotary movements of one 'hundred andl twenty degrees each during each complete rotation osaid head,

three spindles rotatably mounted.- one 'hun-- dred and twenty degrees apartin saidhead,

means for rotating said spindles at the first and second stops and interrupting the-rotation of the spindles atthe third stop of said head, blank holding. chuck jaws=carried by said spindles, means o'ropeningL and closing. said chuck jaws at the first stop of said head," a re-shaving tool movable toward -the axis@ of the chuck jaws at the first stop', a'shavino: tool movable toward the axisy of the'V chuck jaws at the'second stop, afrotatab-le.

slotting saw adjacentthe third stop, and

means for drawing thespindles1-axially to-A ward the slotting sawfat saidL third stop,

being only aslong'as the shaving tool opcrates onthe blanks. i

2. A shaving Jand slotting :machine com-` prising a rotatable head, ratchet and fpa'wl mechanism for imparting three intermittentv rotary movements of one hundred and tw'en-..

ty degrees each duringleach completerotation of said head, three spindles rotatably mounted one hundred and twenty degrees apart in said head, means for rotating said f spindles at the first and' second ystops and' interrupting the rotation of the spindles at shaving toolfope'rate's on the blanks,

3. A shaving and slottingfmachine com prisinga rotatable head, ratchet andapawl mechanism` for imparting-,three intermittentrotary movements of. onehundred and twenty degreeseach duringv each completef rotation of said head, means -for retarding themovements of the head beforezeach stop,f three vspindles rotatably :mounted one-:hun-" dred and twenty degrees apait in saidV head; means for rotatingsa-id spindles at'the first p'ri'sing a rotatable head, mechanism for'im-y Vvparting three intermittent rotary movements 1;30 l

` head, blank ,holding chuck jaws carried by said spindles, means for opening andlclos'in'gshaving tool movable towardthe axis of the chuck ljaws at the second stop, a rotatable Y slotting .sawadjacent thel third stop, and prising a rotatable head, mechanism for immeans for drawing the spindles axiallyI toz lwardthe slotting saw at saidfthird stop said .4

stops of the head carrying the spindles being a only as 10mg 3S lEhe' shaving-.tool-,operates on the blanks. l 4

" 4f.-Av shaving and slotting machine comprising a rotatable head,fratchet-randpawl,

tionrof said head,'means for retarding the movements .ofthe head before each stop, :means for indexing .the head at each stop,

three spindles rotatably: mounted onehundred andtwenty-:degreesapart in said head, e' i means for rotating-saidfspindles at the; first and second stops vandinterrupting the rota'-V f tion ofl therspindles-atthe "thirdstop ofgo said head, blank holding :chuck jaws carried by said spindles,vmeans for opening and cles'- Y ingsaid chuck jaws at the rst stop of said hea'd, aI re-shavingtool movableto'ward the axis of the chuck .jawsat the first stop; a shaving toolmovable toward the" axis of the y kchuckrjaws at -thefsecond stop, a-y rotatablel slottingsaw adjacentthethird stop, and

means for drawingthe'spindlesaxiallyftof'k -100 y ward the slotting saw at said-third kstop said stops "of the `head=carryingv the spindles being only as long as the shaving tool voperates 'f on vthe blanks.v

=r 5. I A shaving and slotting umac'hine -com- -prising a rotatable head, mechanism for -im-V Apartmgthree intermittentl rotary movements of one hundred .-an'dftwentydegrees each during each complete rotationof said head," j-

three lspindles rotatably lmounted onefhun vdred and twenty'degreesapart 'in said head, a beltffor rotating said spindles at the rst and lsecond, stops and Yfriction means for inyterru-'pting the rotation of the spindles at, they third stop yof said head,'blank holdingv chuck jaws carried bysaid: spindles, means" for openingand-closingsaid chuck jaws-at the first stop of said head,'a re-shavingtool movable towardthe axis of the chuck jaws at the' first stop, a shaving-tool movable to' ward the axis of the chuck jaws at the lsec'- ond stop, a rotatable slotting saw-adjacent' the third stop, andmeansfor drawing the 5 spindles axiallytoward the s'lotting saw at said thirdy stop said stopsfzoi'Y the head car-- rying the spindles being `:only as longasjthe shaving tool operateson the blanks;

6.,A shaving and slott-,ingmao'hine comof fone hundred, and twenty degrees each during each complete rotation of said head, three spindles rotatably mounted one hundred and twenty degrees apart in said head, means for rotating said spindles at the first and second stops and interrupting the rota- Vchuck jaws at the second stop, blank backing means movable toward the axis of the chuck jaws at the first and second stops, a rotatable slotting saw adjacent the third stop, and means for drawing the spindles axially toward the slotting saw at said third stop said stops of Jthe head, carrying the spindlesrbeing only as long as the shavingtool operates on the blanks.

7. A` shaving and slotting machine comprising a rotatable head, mechanism for imparting three V intermittent rotary movements during each complete rotation of said head, threeV spindlesv rotatably mounted in said head, means `for rotating said spindles at the first and second stops and interrupting the rotation of thespindles at the third stop of said head, blank holding chuck jaws carried by said spindles, means for opening and closing said chuck jaws at ,the rst stop of said head, shaving tools movable toward the axis of the chuck jaws at thefirst and second stops, a rotatable'slotting saw adjacent the third stop, and means 'or drawing the spindles axially toward the slotting saw at said third stop, said stopsV of the head carrying the spindles being only as long as the shaving tool operates on the blanks.

8. A shavingvand slotting machine comprising a rotatable head, mechanism .for imparting three intermittent rotary movements and stopping said movements at three stations during each complete rotation of said head, three spindles rotatably mounted in said head, means causing the rotation of said spindles at the first and second stations and interrupting the rotation of the spindles at the third station, blank holding chuck jaws carried by said spindles, means for opening and closing said chuck jaws at the first station, a re-shavingtool movable toward the axis of the chuck jaws at the irst station, a shaving tool movable toward'the axis of the chuck jaws at the second station, a rotatable slotting saw adjacent the third station, and means for drawing the spindles axially toward the slotting saw, said stops of the head carrying the spindles being only as long as the shaving tool operates on the blanks.

V9. A shaving and slotting machine comprising a rotatable head, mechanism for imparting three intermittent rotary movements of? one hundred and twentydegrees each to` said head, three spindles rotatably mounted one hundred and twenty degrees apart ink said head, means for' rotating said spindles at the first and second stops and interrupting the rotation of the s indles at the third stop of said head, blank olding chucks carried by said spindles, means for openinor and closing said chucksat the first stop oij said head, a re-shaving tool movable toward the axisl of the chucks at the first stop, a shaving tool movable toward the axis of the chucksV at the second stop, a rotatable slotting saw adjacent the third stop, and means for drawing the spindles axially toward the slotting saw 'at said third stop said stops of the head carrying the spindles being only as long as the shaving toolA operates on theVv 10. A `shaving and slotting machine comprising a rotatable head, mechanism for impartingv three intermittent rotary movements with a dwell between each movementl during each complete rotation of said head, threeV spindles rotatably mounted one hundred and twenty degrees apart in saiolY head, j

means for rotating said spindles duringy the first and second dwells and interrupting the rotation of the spindles during the 'third dwell ofi-,said head, blank holding chucks carried by said spindles, means for opening and closing said chucks during the first dwell of said head, a shaving tool movable toward the axis of the chucks during the first dwell, a shaving tool movable toward -the axis` ofthe chucks during the second dwell, a rotatable slotting saw located 'adico jacent the spindles at thethird dwellingf'r position, and means for drawing the spindles axially toward the slotting saw during the third dwell of the head, said Y dwells of the head carrying the spindles being only as long asthe shaving tool operates on the blanks.

f FRANKvE. NEWTON. 

